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Structure-Properties Relationship in Iron Oxide-Reduced Graphene Oxide Nanostructures for Li-Ion Batteries
- Source :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Publication Year :
- 2013
- Publisher :
- WILEY-V C H VERLAG GMBH, 2013.
-
Abstract
- Non-aqueous sol-gel routes involving the reaction of metal oxide precursors in organic solvents (e.g., benzyl alcohol) at moderate temperature and pressure, offer advantages such as high purity, high reproducibility and the ability to control the crystal growth without the need of using additional ligands. In this paper, a study carried out on a series of iron oxide/reduced graphene oxide composites is presented to elucidate a structure-properties relationship leading to an improved electrochemical performance of such composites. Moreover, it is demonstrated that the easy production of the composites in a variety of temperature and composition ranges, allows a fine control over the final particles size, density and distribution. The materials obtained are remarkable in terms of the particle's size homogeneity and dispersion onto the reduced graphene oxide surface. Moreover, the synthesis method used to obtain the graphene oxide clearly affects the performances of the final composites through the control of the restacking of the reduced graphene oxide sheets. It is shown that a homogeneous and less defective reduced graphene oxide enables good electrochemical performances even at high current densities (over 500 mAh/g delivered at current densities as high as 1600 mA/g). The electrochemical properties of improved samples reach the best compromise between specific capacity, rate capability and cycle stability reported so far.
- Subjects :
- ABSORPTION FINE-STRUCTURE
Nanostructure
Materials science
POWDER DIFFRACTION
REVERSIBLE CAPACITY
FE3O4-GRAPHENE NANOCOMPOSITES
Inorganic chemistry
PERFORMANCE ANODE MATERIAL
Oxide
Iron oxide
Crystal growth
02 engineering and technology
010402 general chemistry
Electrochemistry
01 natural sciences
law.invention
Biomaterials
chemistry.chemical_compound
X-RAY-DIFFRACTION
law
NONAQUEOUS SYNTHESIS
SIZE DISTRIBUTION
Graphene oxide paper
Graphene
Graphene foam
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Electronic, Optical and Magnetic Materials
chemistry
LITHIUM STORAGE
ELECTROCHEMICAL PERFORMANCE
0210 nano-technology
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Journal :
- Repositório Científico de Acesso Aberto de Portugal, Repositório Científico de Acesso Aberto de Portugal (RCAAP), instacron:RCAAP
- Accession number :
- edsair.doi.dedup.....ff207c455223729ff0447ec4ef134b3e